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Doctors from the Therapeutic Clinic of the National and Kapodistria University School of Medicine of Athens summarize the revised instructions from the US Centers for Disease Control for the use of masks.
Theodora Psaltopoulou, Panagiotis Malandrakis, Ioannis Danasis, and Thanos Dimopoulos (Rector of EKPA) report that as the SARS-CoV-2 virus is transmitted from person to person through the respiratory tract, wearing a mask is a simple barrier to infection. infectious respiratory diseases.
So is necessary even for the not sickAs studies have shown that patients who never have symptoms or have not yet developed them also transmit the virus.
The main value of the mask, according to the Athens Agency, is to protect others in case someone gets sick, especially if they cannot maintain a distance of at least 2 meters. The use of the mask also protects the wearer from others, depending on their material.
Everyone should wear a mask, as the scientists point out. The exceptions, potentially, are children under the age of 2, people with respiratory problems and people with behavioral or cognitive problems, where it is necessary to try different prevention alternatives.
The types of masks
Correct one cloth mask It should be made of at least two levels of tight-fitting fabric, such as cotton, and facilitate breathing through it (leather and plastic masks should be avoided)
the non-surgical disposable masks It can be used in situations where the cloth mask can get dirty. Inhalation valve masks are not recommended because they do not protect against the spread of the virus should the user become ill.
Surgical masks should be used by healthcare professionals.
the clear plastic mouthwash covers They are an alternative for special occasions, such as deaf people, children learning to read or for students learning foreign languages, people with disabilities or in cases where oral movements such as singers must be seen.
If this alternative is used, it should be confirmed that the user is breathing normally, that no moisture accumulates inside the mask, and that the mask should be removed during sleep.
Other types of face protection, such as glasses and face shield are not recommended as a replacement for the mask, since they leave large gaps around the face that allow the passage of micro-drops.
In cases where the mask cannot be used and is the only solution use of shield, then it should cover the entire face up to the chin. It is also recommended to wash your hands thoroughly when removing the protector and if it is reusable it should be disinfected according to the manufacturer’s instructions.
In cases where the use of a mask is not possible, guidelines are established for the optimal prevention of virus transmission. In restaurants it is recommended to wear a mask except when eating.
In activities in the water, the use of the mask is also difficult, as in sports activities -in general- of higher intensity, but the distance of two meters between people is recommended.
In people with chronic breathing problems The use of the mask can be discussed with your doctor, while people with asthma can wear a mask normally. Those who work outdoors may not be able to wear a mask due to the increased risk of heat stroke at high temperatures. In this case, wearing a mask is a priority when there are many people together.
It is also important to emphasize that wearing a mask does not increase the levels of carbon dioxide (CO2) that the user inhales.
The CO2 molecule is small enough to pass through the sides of the mask during breathing and speech, and through the mask, whereas the virus is large enough to pass through a properly fitted mask.
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